Datasheet > BD83A44EFV-M

BD83A44EFV-M

更新时间： 2024-04-09 18:58:41

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
50页	2338K
描述
This IC is a white LED driver for LCD backlight. It has MOS for boost and 4ch current drivers for

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BD83A44EFV-M 数据手册

BD83A44EFV-M BD83A44MUF-M

Pin Descriptions – continued

Pin No.

Signal Type

Pin Name

Function

(Note 1)

EFV MUF

Switching pulse number setting: Pulse addition function is provided to stabilize DC/DC

converter output voltage even when PWM Duty is low. The number of switching pulses to be

added can be set by the capacitance value connected between the PLSET pin and the GND

pin.

17 14 PLSET

18 15

20 16

19 17

PGND

Large current ground 2: GND of DC/DC converter. Use it for C_OUTground.

FET drain signal for boost: Switching signal output of DC/DC converter. Connect the SW

pin to the node between the inductor and the rectifier diode.

N.C.

Not connected internally.

Output for driving the load switch gate: The signal output for driving the gate of the load

switch. When the input overcurrent protection is activated, the load switch is turned OFF as

LDSW pin voltage = VCC pin voltage.

22 18

23 19

LDSW

CSH

Input current detection input: The input current is converted to voltage by the input current

detection resistor (R_CSH) connected between the VCC-CSH pin and detected by the CSH

pin. Turns the load switch OFF when the input overcurrent protection is activated.

Power supply voltage input: The input operating voltage range is 4.5 V to 48.0 V, but when

the IC is started, start it with VCC ≥ 5.5 V. The decoupling capacitor (C_VCC) between the

VCC pin and the GND pin should be as close to the IC pin as possible.

24 20

21 21

VCC

N.C.

REG

Not connected internally.

Internal reference voltage: Used as the reference voltage for the internal circuit. 5 V is

generated and output by setting the EN pin to High. Connect a capacitance of 2.2 μF for

phase compensation.

Small signal ground: Use this for the ground of external components connected to the

REG, RT, COMP, ADIM, ISET, PLSET, OVP, and VCC pins.

GND

Enable input: The EN pin is turned High to activate the internal circuit. The internal circuit

stops and the standby state is set by setting to Low.

EXP-

PAD

The EXP-PAD should be connected to the board ground.

(Note 1) A: Sensitive signal such as detect and reference, I: Input signal from other units, O: Output signal to other units, P: Large current signal susceptible to

impedance, including transient current.

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TSZ02201-0T2T0B200460-1-2

4/47

TSZ22111 • 15 • 001

08.May.2023 Rev.001

1 2 345 6 7...50

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